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中括号括号一点八减零点六括号除以方块加二点五种...

【(1.8-0.6)/()+2.5】*0.4=3.4

2.8*(2.8-1.2)/0.14=20*1.6=32

35.35+(2.8-0.8)÷80% =35.35+2÷0.8 =35.35+2.5 =37.85 望采纳,谢谢

是5.8x(3.87-0.13)+4.2x3.741吗? 先算括号内3.87-0.13=3.74 然后先乘除后加减,5.8x3.74=21.692 , 4.2x3.741=15.7122 最后21.692+15.7122=37.4042

32÷(6/25) =32×(25/6) =400/3. (2/4)×0.8 =0.5×0.8 =0.4. 1.2+(1/4) =1.2+0.25 =1.45. 5.25-(1+1/4) =5.25-1.25 =4.

10.8÷【(5.2-1.6)×0.3】 =10.8÷【3.6×0.3】 =10.8÷1.08 =10

解:依题意算式 (-497)-(-361)-(+292)+(-661) =-497+361-292-661 =-(497+292)+(361-661) =-7+(-3) =-10 即(-497)-(-361)-(+29

(-4.5)-(-2.8)-(-3.2)+(4.5) =2.8+3.2 =6

(7.2×2.4-9.48)÷0.25 =(17.28-9.48)÷0.25 =7.8×4 =31.2

薇薇一笑倾城

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